FIX: go test timeout after running benchmark test

[hzxuzhonghu]

…timeout

What type of PR is this?

What this PR does / why we need it:

Without cleaning up hash file, test will fail with timeout error. By default vs plugin set 30s timeout.

Which issue(s) this PR fixes: Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 51.20%. Comparing base (433592b) to head (4e84096). Report is 8 commits behind head on main.

Files	Coverage Δ
pkg/controller/workload/workload_hash.go	82.45% <100.00%> (+0.97%)	:arrow_up:

... and 2 files with indirect coverage changes

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[hzxuzhonghu]

/retest

[hzxuzhonghu]

/retest

[hzxuzhonghu]

@nlgwcy @supercharge-xsy Can you please take a look

[LiZhenCheng9527]

/lgtm

[kmesh-bot]

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